Earlier today, the Government Accountability  Office (GOA) released its report on the 2008-filing season. Below is  a quote from the report, but you can download a PDF of the full report  at IRS's  2008 Filing Season Generally Successful Despite Challenges, Although  IRS Could Expand Enforcement During Returns Processing.
 IRS successfully processed 150 million  returns and issued 105 million refunds for $246 billion as of September  12, 2008. In addition, IRS issued 116 million stimulus payments totaling  $94 billion. However, taxpayers’ access to IRS’s telephone assistors  was substantially lower than last year because of an unanticipated increase  in telephone call volume. Calls to IRS more than doubled to 118 million  as many taxpayers had questions about the amount of their stimulus payment  or its timing. IRS acted to answer the calls including shifting hundreds  of staff from collection cases to telephone assistance. IRS took other  actions such as adding features to its Web site that answered stimulus-related  questions and likely diverted some calls. Regardless, taxpayers’ ability  to get through to IRS telephone assistors declined from about 81% of  waiting callers getting through last year to about 57% from January  through June 30 of this year.